CN87208000U

CN87208000U - O-type pressure-regulating multi-directional change-valve for oil gallery

Info

Publication number: CN87208000U
Application number: CN 87208000
Authority: CN
Inventors: 秦世宽
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-05-16
Filing date: 1987-05-16
Publication date: 1988-03-02

Abstract

The utility model relates to an O-type pressure-regulating multi-directional change-valve for an oil gallery, which is suitable for the engineering machine, the hoist-transportating machine or the self-propelled machinery of the centralized control of a plurality of working mechanisms of other requirements; each reversing valve core is evenly distributed on the same radius of a circle by the valve; a storage cavity is arranged in the valve body, and the working oil pressure is kept stable; an O-type oil path which is communicated with the groove space of the reversing valve core is formed through the expanding section; a pressure regulating device and a safety device are also provided, and thus the direction and the pressure can be controlled. The utility model has the advantages of compact structure, small size, light weight, simple manufacturing process and low cost.

Description

O-type pressure-regulating multi-directional change-valve for oil gallery

The multinomial selector valve of this pressure regulation zero type oil circuit is the important control element of hydraulic system, this valve has the effect of two kinds of valves of pressure control and direction control, is specially adapted to engineering machinery, handling machinery and other require the central controlled self-propelled type of a plurality of operation mechanisms mechanically.

Existing heavy wool road valve generally is to be combined side by side by several hand-operated direction valves that are rectangle, and for example the heavy wool way reversing valve of China's production has ZFS type and ZL type.This class selector valve volume and weight is all bigger, for example generally heavily is 19.5 kilograms by what a kind of specification (ZFS-L10) five of its minimum connected, and its main body overall sizes is 101 * 281 * 230.Though the oil circuit that is provided with between its each selector valve can be designed to parallel, tandem, single-lift and combined type in proper order by control requirements, but this class selector valve only plays the control directive effect, and the pressure control of whole hydraulic system also must dispose pressure control valve and solves in other words.

Task of the present utility model is to improve the deficiency that existing heavy wool road valve exists, the multinomial selector valve of a kind of pressure regulation zero type oil circuit is proposed thus, this valve is configured in each changeover valve core in the valve body by same radius of a circle is uniform, thereby make oil circuit shorten, bend minimizing, the little difficult heating of flow resistance, the valve body center portion is provided with an accumulation of energy chamber, guarantees that the pressure of each operation mechanism of control is comparatively stable.Enlarged section by the accumulation of energy chamber forms zero type oil circuit.For Control work pressure valve body is provided with regulator and safety installations.Commutation position groove is more in the general valve body of existing in addition heavy wool road valve, processed complex, and holing by gland according to heavy wool way reversing valve of the present utility model replaces making groove, thereby has simplified processing.Comprehensive above-mentioned visible this valve has characteristics such as compact structure, volume are little, in light weight, and technology is simple and its cost that makes easy to manufacture is lower simultaneously.

Now the embodiment shown in conjunction with the accompanying drawings is to being described further according to multiple directional control valve of the present utility model.

Accompanying drawing has:

Fig. 1 represents the schematic representation of the multinomial selector valve in pressure regulation zero type valve road,

The plan view that Fig. 2 represents the multinomial selector valve of pressure regulation zero type oil circuit as

Fig. 3 represents the sectional view by the multinomial selector valve of the zero type oil circuit of pressure regulation shown in Fig. 2 line A-A

The operating device of all not shown pressure gauge and changeover valve core in the accompanying drawing.

As seen from Figure 1, from the pressure oil of oil pump,, enter accumulation of energy chamber 3 by filter 2 smart filters through filler opening 1, the big I of its pressure directly is equipped with a pressure gauge by the regulator 4 that is disposed reads, and it is on the obstructed position of oil circuit that changeover valve core 5 remains on the neutral position by spring.When manipulation spool 5 makes it to move on the certain position, pressure oil in the accumulation of energy chamber 3 just flows to oil outlet 7 by its enlarged section and spool recess space, thereby promote relevant work mechanism for example oil hydraulic pump and hydraulic work cylinder, this moment, 6 of oil outlets communicated with oil circuit.When spool 5 stopped on the neutral position, oil circuit cut off, and operation mechanism is remained on the certain position.Otherwise when manipulation spool 5 made it to be displaced downwardly on the certain position, pressure oil just flowed to oil outlet 6, thereby makes above-mentioned oil hydraulic pump and hydraulic work cylinder, did oppositely to move, and this moment, 7 of oil outlets communicated in oil circuit.The fundamental circuit of above-mentioned selector valve work that Here it is.Regulator 4 is set plays pressure limiting or pressurization to pressure oil, promptly the valve rod of this device is opened with regard to overcoming spring force when working load surpasses specified value, the valve rod that then can press down this device when working pressure need increase reaches, and can add a device on the valve rod this moment.Safety installations 8 is provided with for control accumulation of energy chamber 3 internal pressures oil maximum pressure.Comprehensive above-mentioned this valve as can be known has the effect of pressure control and two kinds of valves of direction control.

As seen from Figure 2, each changeover valve core of this valve is configured in the valve body by same radius of a circle is uniform, so its profile can rounded or polygonal.Its oil outlet position can be provided with corresponding convex to satisfy the needs on connecting.Compare with the multinomial valve of oil circuit that traditional rectangular combines side by side, can greatly or dwindle according to its overall sizes of multiple directional control valve of the present utility model.

As seen from Figure 3, pressure oil forms zero type oil circuit by accumulation of energy chamber 3 by its enlarged section and communicates with the recess space of changeover valve core 5, and it is the shortest that configuration can make the length of reversing oil circuit like this, thereby can reduce the loss of pressure and heat.Close joining of the corresponding valve core housing that press-fits have technology characteristics simple and easy to manufacture on changeover valve core 5 and the valve body in addition, thereby make its cost lower.When wearing and tearing, part can also change the valve core housing reparation when above-mentioned close joining simultaneously.

Claims

The multinomial selector valve of a kind of pressure regulation zero type oil circuit by being equivalent to want the selector valve of Control work mechanism number to form, is characterized in that; Each changeover valve core is configured in the valve body by same radius of a circle is uniform, rounded or the polygonal of valve body profile, valve body center filler opening one side is provided with filter and an accumulation of energy chamber, the accumulation of energy chamber communicates with the recess space of each steering spool by the enlarged section that forms zero type oil circuit, each changeover valve core then be with valve body on corresponding close joining of the valve core housing that press-fits, the upside in valve body accumulation of energy chamber is provided with two can direct mounting gauge and regulator, and the side in accumulation of energy chamber is provided with a safety installations that communicates with it.